Heat and Vibration Levels: Heat and vibration massage to relieve knee pain. The built-in heating pad can warm your knees, promote blood circulation and aid recovery after injury. Provides ultra-comfortable heat therapy to joints to help relieve strain and soreness, helping tissues recover faster. Wireless LED controller: The integrated design of the portable magnetic battery controller replaces USB power supply methods such as mobile power supplies and does not require an external power supply. power cable. The knee massager supports more occasions such as driving, home, office or traveling to relax, the wireless battery allows you to enjoy this knee massager anywhere. Multifunctional: It includes extended shoulder straps, also suitable for shoulder massage, suitable for bust sizes from 27 inches to 55 inches, arm sizes from 9 inches to 16 inches, easy to operate. GREAT KNEE CARE TOOL: The heating pad is the perfect gift for family, friends or anyone who needs it. You can enjoy heating and vibration modes simultaneously or separately according to your needs. Helps better apply heat to the joint area, providing stable support and optimal compression. X22 chip: Using advanced X22 smart chip, NTC temperature control system, overheating protection, rapid heating, more stable power output, intelligent operation detection overheating protection and overload protection, safe and reliable.